gen_angry wrote:
I have a K6-2 500mhz box somewhere that I'll fish out and throw this on if you're interested.

You'd better not to do so...
I had a Toshiba laptop that used a Pentium III 700MHz(ultra low power Tualatin). PCem v10 runs, but the speed was only 20% when emulating PC XT...
Amd My IBM ThinkPad T42 which used a Pentium M 2.0(slightly slower than Pentium 4 3.0GHz) and it emulated a 486DX 33 PC very well...

Slight sound stuttering on game start (only for a moment), and at mission start (again only for a moment), but all
other game functions perform perfectly, and is at a near constant 100/99% at all times.

Runs 486DX 33MHz recompiler at best. Directdraw surface appears filtered. Doom is playable with SB16 music and sound.
Only the recompiler is usable, the interpreter's too slow for 386 (though haven't tried XT machines on it yet)

omarsis81 wrote:Don't worry, PCem is unaffected by video card's performance, it only relies on the CPU

That's false. The graphics card can and does affect the PCem. If it does Direct3D 9 badly, then PCem will be slower with that, if it also does DirectDraw badly, then you have no way of running PCem at a decent speed.

omarsis81 wrote:Don't worry, PCem is unaffected by video card's performance, it only relies on the CPU

That's false. The graphics card can and does affect the PCem. If it does Direct3D 9 badly, then PCem will be slower with that, if it also does DirectDraw badly, then you have no way of running PCem at a decent speed.

All I use PCem for is recreating my old AMD 386/40mhz, and the emulation is faithful to the point that my memory recalls and reacts instinctiely to the same lags, stuttering and timings of things like a certain part of a certain game, or compiling certain sources with Borland Pascal, etc. as 25 years ago

Yet, with HyperThreading enabled (the cpu has 6 physical cores / 12 logical cores with HT), all changes. It seems to be way too fast or way too slow at times. I didn't bother benchmarking accurately, but it's really perceivable.

All I use PCem for is recreating my old AMD 386/40mhz, and the emulation is faithful to the point that my memory recalls and reacts instinctiely to the same lags, stuttering and timings of things like a certain part of a certain game, or compiling certain sources with Borland Pascal, etc. as 25 years ago

Yet, with HyperThreading enabled (the cpu has 6 physical cores / 12 logical cores with HT), all changes. It seems to be way too fast or way too slow at times. I didn't bother benchmarking accurately, but it's really perceivable.

This is troubling. Just to be clear, you're sure that the emulation speed percentage displayed in PCem's title bar is always staying at ~100%, both with HyperThreading enabled and with it disabled, right? If the emulation speed itself is deviating significantly from 100%, of course that's going to be your problem, but I'm guessing that's not the case?

All I use PCem for is recreating my old AMD 386/40mhz, and the emulation is faithful to the point that my memory recalls and reacts instinctiely to the same lags, stuttering and timings of things like a certain part of a certain game, or compiling certain sources with Borland Pascal, etc. as 25 years ago

Yet, with HyperThreading enabled (the cpu has 6 physical cores / 12 logical cores with HT), all changes. It seems to be way too fast or way too slow at times. I didn't bother benchmarking accurately, but it's really perceivable.

This is troubling. Just to be clear, you're sure that the emulation speed percentage displayed in PCem's title bar is always staying at ~100%, both with HyperThreading enabled and with it disabled, right? If the emulation speed itself is deviating significantly from 100%, of course that's going to be your problem, but I'm guessing that's not the case?

The emulation speed stays at ~100 both with and without HT.
Interestingly, after for unrelated reasons I reinstalled PCem from scratch, the problem for now seems gone.

I can get 100% performance using a Pentium MMX 200 on Award 430VX PCI. However, with late 90's graphically intensive games using the Voodoo card performance takes a hit to around 80-90%, but if I scale down to a Pentium MMX 166 it maintains 98-100%. All in all, very happy with my setup and PCem in general.